Now i want to extend this by adding one or two more text fields basically for the sake of validation. eg like adding a third field for Recapture since the form will be on every page of the site.

after login user have to be redirected to their respective page with relevant content.

i am using CustomeLogin form and the here is the code

<?php
class CustomLogin extends MemberLoginForm {
// this function is overloaded on our sublcass (this) to do something different
public function dologin($data) {
if($this->performLogin($data)) {
if(!$this->redirectByGroup($data))
Director::redirect(Director::baseURL());
//echo 'done';
} else {
if($badLoginURL = Session::get("BadLoginURL")) {
Director::redirect($badLoginURL);
} else {
Director::redirectBack();
}
}
}
public function redirectByGroup($data) {
// gets the current member that is logging in.
$member = Member::currentUser();
// gets all the groups.
$Groups = DataObject::get("Group");
//cycle through each group
foreach($Groups as $Group){
//if the member is in the group and that group has GoToAdmin checked
if($member->inGroup($Group->ID) && $Group->GoToAdmin == 1)
{
//redirect to the admin page
Director::redirect(Director::baseURL() . 'admin' );
return true;
}
//otherwise if the member is in the group and that group has a page link defined
elseif($member->inGroup($Group->ID) && $Group->LinkPageID != 0)
{
//Get the page that is referenced in the group
$Link = DataObject::get_by_id("SiteTree", "{$Group->LinkPageID}")->URLSegment;
//direct to that page
Director::redirect(Director::baseURL() . $Link);
return true;
}
}
//otherwise if none of the above worked return false
return false;
}
}
?>